A disinfection method using an antiseptic solution having an aqueous medium and hydrogen peroxide dissolved therein, characterized in that the antiseptic solution is accommodated in a container so as to have a depth of 3 to 10 mm, an article to be disinfected is immersed in the antiseptic solution, and then the antiseptic solution is irradiated with a light having a wave length of 280 to 385 nm at least in the direction of its depth, to thereby disinfect the article to be disinfected. The disinfection method can be carried out with ease and simplicity, and also exhibits excellent disinfecting effect.
